Final answer:
The average speed of the runner is 5.33 km/h.
Step-by-step explanation:
The average speed of a runner can be calculated by dividing the total distance traveled by the time taken. In this case, the runner traveled 8 km in 1.5 hours. So the average speed would be 8 km divided by 1.5 hours, which equals 5.33 km/h. Therefore, the correct answer is Option B) 5.33 km/h.